preserving comments

[vzaliva]

Hi! I am trying to parse a language where comments contain annotations which I want to preserve. Now I have:

    extras: $ => [
        /\s/,
        /--.*\n/,
        /{-.*-}/,
    ],

How can I preserve my {- ... -} comments in the AST? They could appear anywhere where whitespace is allowed. Thanks!

[WillLillis]

Would it be possible to define the annotations as a subfield of a comment? Looking at what you currently have in the repo, would something like this work?

module.exports = grammar({
    name: 'core',

    extras: $ => [
        /\s/,
        $.comment,
    ],

    
    rules: {
        source_file: $ => repeat1($.declaration),

        comment: _ => token(choice(
            /--.*\n/,
            seq('{-', field('annotation', /.*/), '-}'))),

...

[vzaliva]

Thanks! I think this would work.